DeeperSpeed is a fork of the Deepspeed library that is tailor-made for the GPT-NeoX by EleutherAI.

Prior to 3/9/2023, DeeperSpeed was based on an old version of DeepSpeed (0.3.15). In order to migrate to the latest upstream DeepSpeed version while allowing users to access the old versions of GPT-NeoX and DeeperSpeed, we have introduced two versioned releases for both libraries:

• Version 1.0 of GPT-NeoX and DeeperSpeed maintain snapshots of the old stable versions that GPT-NeoX-20B and the Pythia Suite were trained on.
• Version 2.0 of GPT-NeoX and DeeperSpeed are the latest versions built on the latest DeepSpeed, and will be maintained going forward.